/usr/lib/python3/dist-packages/pygal/graph/pyramid.py is in python3-pygal 2.4.0-1.
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# This file is part of pygal
#
# A python svg graph plotting library
# Copyright © 2012-2016 Kozea
#
# This library is free software: you can redistribute it and/or modify it under
# the terms of the GNU Lesser General Public License as published by the Free
# Software Foundation, either version 3 of the License, or (at your option) any
# later version.
#
# This library is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
# details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with pygal. If not, see <http://www.gnu.org/licenses/>.
"""
Pyramid chart: Stacked bar chart containing only positive values divided by two
axes, generally gender for age pyramid.
"""
from __future__ import division
from pygal.adapters import positive
from pygal.graph.horizontal import HorizontalGraph
from pygal.graph.stackedbar import StackedBar
class VerticalPyramid(StackedBar):
"""Vertical Pyramid graph class"""
_adapters = [positive]
def _value_format(self, value):
"""Format value for dual value display."""
return super(VerticalPyramid, self)._value_format(value and abs(value))
def _get_separated_values(self, secondary=False):
"""Separate values between odd and even series stacked"""
series = self.secondary_series if secondary else self.series
positive_vals = map(sum, zip(
*[serie.safe_values
for index, serie in enumerate(series)
if index % 2]))
negative_vals = map(sum, zip(
*[serie.safe_values
for index, serie in enumerate(series)
if not index % 2]))
return list(positive_vals), list(negative_vals)
def _compute_box(self, positive_vals, negative_vals):
"""Compute Y min and max"""
max_ = max(
max(positive_vals or [self.zero]),
max(negative_vals or [self.zero]))
if self.range and self.range[0] is not None:
self._box.ymin = self.range[0]
else:
self._box.ymin = - max_
if self.range and self.range[1] is not None:
self._box.ymax = self.range[1]
else:
self._box.ymax = max_
def _pre_compute_secondary(self, positive_vals, negative_vals):
"""Compute secondary y min and max"""
self._secondary_max = max(max(positive_vals), max(negative_vals))
self._secondary_min = - self._secondary_max
def _bar(self, serie, parent, x, y, i, zero, secondary=False):
"""Internal stacking bar drawing function"""
if serie.index % 2:
y = -y
return super(VerticalPyramid, self)._bar(
serie, parent, x, y, i, zero, secondary)
class Pyramid(HorizontalGraph, VerticalPyramid):
"""Horizontal Pyramid graph class like the one used by age pyramid"""
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